<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <script src="./src/icreate.core.js"></script>
	    <script src="./src/icreate.dom.js"></script>
	    <script src="./src/icreate.event.js"></script>
    </head>
    <body>
        <button id="btn"> click </button>
    </body>
    <script>

    I( '#btn' ).on( 'click', function () {
        alert( '11111111111111' );
    });
    var f;
    I( '#btn' ).on( 'click', f = function () {
        alert( '22222222222222222' );
    });

    I( '#btn' ).off( 'click', f );


    </script>
</html>